Well that is true. Higurashi is a fun example to look into over amplitude of various outcomes of several paths, although it seems that the outcomes are only summed up to Rika the observer ultimately. Without spoiling the story, the outcome rests heavily on achieving a very specific set of state that has questionable amplitude of occurrence as opposed to the rather typical sets which have much higher amplitude!

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It would be enough for the depressing things in life to only exist in reality.
It is because that I think the birth of a story... is from people dreaming of a happy ending. ~Misaka Shiori